Releasing device for the combing-wheels in sheet-feeders.



s. sPlEss. RELEASING DEVICE FOR THE COMBING WHEELS IN SHEET FEEDERS.

APPLICATION FILED JUNE 25|.I9I5.

1,192,011.` Patentmuwf, 191e.

2 iNUIR numb-umu wAsHlNnmN. n. c

Y sheet feeders.

.Unia

STATns PATE o GEoRGsPIEss, or LEIPZIG, GERMANY.

RELEAS'ING IDEVIEr FOR THE GOlVIBING-WHEELS IN SHEET-FEEDERS.

Sheet-Feeders, of which the following is a y specification. t

This invention has reference to a novel releasing device for the combing wheels in In the usualsheet feeders, thatis the machines which serve for separating single sheets of paper from a bank of sheets and transport them farther, there is provided a special device toraise from the table the combing wheels which transferthe single sheets, and a special device for advancing the lbank of sheets. Both movements are brought into certain relations to each other and the release of the combing wheels must take place, at the moment, when a sheet with its front edge, while entering between the transporting rolls, actuates a finger. The weak force of the edge of the sheet of paper, even if saidslieet is thin, must be utilized for initiating the raising of the combing wheel which must be effected as free from vibration as possible, because the sheet feeder works with exceedinglyhigh t speed.

According to the present invention, the

catch which is influenced by the ingeris linked to a movably mounted bar which affects the movement of the press leverthat checks the releasing devicefor the combing wheels when ascending. Y i

The invention is illustrated in the accompanying drawing in whichz` Figure l represents in front view a` releasing device for the combing wheels in sheet feeders embodying in desirable form the present improvements. Fig. 2 is a similar view showing the operative mechanism in a different position with y'the bank of sheets partly cut away.

In the machine herein described two or more combing wheels are employed and a corresponding number of sheet feeders. For convenience sake theV construction and operation of a single combing wheel will be described in detail. Fig. 3 is a'planr view of the releasing device.

In the releasing device illustrated the combing wheel A is mounted on the swing arm B in the usual manner so that the Specification of Letters Patent.

lPatented July 25, 197,16.

Appli-cation filed .T une 25, 1915. Serial No. 36,174.

combing wheel remains active in every poi sition. The swing arm B may perform an ascending or descending motion by means of an angular lever C. This angular lever rests with its outer end portion D upon a spring actuated bar F. rThe-spring ,r G tendsy to keep the ybar F in its highest position and the combing wheel A then is also in its raised position so that it'has no effect on the `transfer of the wheel. The bar F is checked by two pins IVI-I which serveas brake cheeks. an angular lever K which has a pivotal point at L and is held in its highest position by a spring M. l

Theoperation of the angular lever K, according to lthe present invention, is

These pins are secured toY effected by means of a bar N which bears,

with its free .outer end, against thev free bottom end `of theV angular lever K. A catch C ismovably suspended from the bar N and is kept in readiness for work by means of a swing arm which is movably mounted upon a shaft carrying the iinger Q. The weight of the finger Q causes theswing arm P to press said swing arm in a' downward direction. The free end of the swing arm P then restsagainst the notch of the member R of the catch O when the comber falls, which notch forms an extension of the catch beyond the pivotal point. The catch 0 is purposedto engage the teeth of a movable tooth rack S and ,is kep-t out of engagement with the rack until the finger actuated bythe passing sheet is raised. 'When the tooth rack S is checked Y it effects the releasing of the combing wheel Ain theknown manner and also influences the transfer of the bank of sheets. Y f

For actuating the transport roll V of the feathered bank of sheets a pawl and ratchet mechanism is provided adjoining said roller V. This mechanism consists of a ratchet l/V and a pawl X adapted to drive the ratchet, said pawl being linked to a swing arm Y.

By means of gears the movement of the pawl and ratchet mechanism is transmitted to the transport roll V.

The swing arm Y receives its. motion from the crank pin Z1 which is mounted on a crank disk Z2. The motion of the crank pin is transmitted upon a swing arm 1 by" means of the crank rod Z in peculiar manner. The swing arm l carries a pin 2 which is located' within a slot 3 formed in the enlarged end of the crank rodWr-W.

C. The connection' between these parts is assured by means of the spring t which tends to draw the whole swing arm 1 toward the crank rod Z. A rod 5 is linked to the swing arm 1'which rod is attached to the swing arm Y of the pawl and ratchet mechanism. In this manner the turning movement of the crank Z1 -is transmitted, by the described intermediary elements, to the transport roll V. The movement of the swing arm 1, however, is limited by means of thetooth rack S which is provided with a pin 6 that reaches into a slot 7 of the swing arm 1. lf thek tooth rack S is suddenly stopped then the crank Z1 may continue its movement toward the left but the swing arm 1 and, as afconsequence, the'swing army Y do not perform this movement. VThemovement of the tooth rack S which is Vcarried along by the swing arm 1 may nowbe limited by means vof the catch O which engages the teeth of therack.` If now-the finger Q is actuated by the fr'ontedge of a passing sheet then the swing arm P releases they catch O which now engages the teeth of the rack S, as shown in Fig. 2, whereby the motion of the tooth rack S is neXt transmitted to the bar N and from this bar to the angular lever orbar K. The barK now brings the stop pins H-I into another locationwhereby the clamping of the har F is released which bar then ascends under the action of the spring Gr and takes alongthe angular lever C. The lever C,y in turn, moves the lever B of the combing wheel A whereby the combing wheel A is raised from the sheet. The bar F further has a pin U which acts on an auxilv iary arm T of the finger Q and moves said arm upward whereby the linger Q also is raised beyond the sheet of paper.

According to the period of timewhen the front edge of the topfsheet of paper raises the finger Q sooner or later, the'swing arm 1V and the swing arm Y will be limited in their respective positions sooner or later relative to'thei'r positions to the crank rod Z. For each revolution of the crank the time of the release of the combing wheeland also the time for advancing the bank of sheets is regulated so that both movements are harmonized. At the end of each 'completed revolution of the crank Z1 all the other elements are yreturnedfintotheir initial positions by well known intermediary elements. As stated the bar Fis raised by the spring Gr and takes along the lever C. The bar F is returned into its initial position during each revolution of the crank Z1; This is effected by means of the curve disk 11 mounted upon 'tion in which it is .held by the pins H, I, and

all the other members have been returned into their initial position.

Iclaim as my invention:

1. A releasing device for the combing wheels in sheet feeders comprising a finger adapted to be operated by the front edge of a passing sheet, a catch actuated by said finger, a bar to which said catch is pivoted, and a brake lever actuated bysaid bar.v

2. A releasing device for the combing wheels in sheet feeders comprising a finger adapted to be operated by the front edge of a passing sheet, a catch actuated by said finger. a movable tooth rack adapted to be limited in its movement, a barV to which said catch is pivoted, and abrake lever actuated by said bar. y

8. A releasing device for the combing wheels in sheet feeders comprising a finger adapted to be operated by the front edge of a passing sheet, a swing arm supporting the finger, a catch actuated by said finger and swing arm, a movable tooth rack adapted to receive periodically the catch to limit its movement, a bar to which said catch is pivoted, and a brake lever actuated by said bar.

l. A releasing device for the combing wheels in sheet feeders comprising a finger adapted to be operated by the front edge of a passing sheet, a catch actuated by said finger, a bar to which said catch is pivoted, a brake lever actuated by said bar, and means in connection with said brake lever to release the combing Wheels.

5. A releasing device for combing wheels in sheet feeders comprising a finger adapted to be operated by the front edge of a passing sheet, a catch Yactuated by said finger, a bar to which said lcatch is pivoted, abrakelever actuated by said bar, means in connection with said brake lever to release thecombing wheels, and means for advancing the bank of sheets to bring the top sheets successively underneath the said combing wheels.

Signed at Leipzig, Germany,-this 4th day of May, 1915.

GEORGV SPIESS.

Washington, D. C.

Copies of this patent maybe obtained for five cents each, by addressing the Commissioner of Patents, 

